【精品】关于dsp语音信号编解码器设计 毕业论文.doc

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摘要
DSP芯片,也称数字信号处理器,是一种针对数字信号处理而特别设计的微处理器。随着超大规模集成电路技术上取得的突破进展,集成化的DPS数字信号处理器具有体积小、功耗低和运算速度快等诸多优点,因此非常适用于语音信号的压缩处理。目前的DPS芯片以其强大的数据处理功能而在通信和其他信号处理领域得到广泛注意,并已成为开发应用的热点技术。
近年来,随着多媒体信息技术和网络技术的高速发展,数字语音压缩技术的应用领域越来越广泛,目的是在保证语音一定质量的前提下尽可能降低其编码比特率,便于在有限的传输带宽内让出更多的信道来传送图像、文档、计算机文件和其他数据流。为此,国际电信联盟(ITU),即PCM编码调制。具有语音质量高、低延时和稳定性好的优点,可用于数字语音通信领域,具有很高的研究价值。
本文首先简要的介绍了语音压缩编码算法的发展进程,以及发展趋势。,详细说明了基于高性能DSP(TMS320F2812)的语音压缩编解码系统的实现方法,并针对算法的实时实现出现的运算量大的问题。
全文分为四章,第一章概述语音压缩编解码的发展进程、趋势以及课题的主要研究内容及意义。第二章分析了语音信号编、、硬件的开发和设计。第三章主要对结果进行讨论与验证。第四章详细的对全文进行了总结。
关键词:语音压缩编码,, TMS320F2812。
Abstract
DSP Processor is designed for real-time digital signal the great Progresses and a series of break-through in VLSI technologies,integrated DSPs process out soon after. Integrated DSPs Possess many advantages,such pactness,low Power cost,and which are mostly suitable in speech pressing. Present DSPs are getting more and more attentions in the information field,due to its Powerful signal Processing ability,ing munication and other relating signal nrocessing areas.
With the rapid development of munication technology and technology, Application of Digital speech Coding is more widely in recent years. Digital speech Coding can reduce rate of bits ,for the purpose of provided more channels to transfer image、puter files and other Data stream, but the operation must assure quality of speech. So ITU introduce , a pressing criterion, 64kbps rate speech criterion be applied in the area of digital munication and be worth researching introduced. On the basis of analysis and research to theory of criterion arithmetic,realization of the algorithm of speech coding’s system based on TMS320F2812 is narrated .Due to large operation when arithmetic is run in real-time,several methods of optimized codes was put forward .Loaded optimized codes in TMS320F2812 and simulated,the arithmet